Putnam, New York, 1989, 1^st/1^st.  ISBN 0-399-13440-9.  Hard cover, 656 pages.  Near fine; sharp corners, tight binding with headbands.  Dust jacket with price intact shows light edge wear and a few small impressions; small nicks at upper edges of inner flaps.  Interior clean and unmarked, pages lightly tanning.  Appears unread.  Columbian drug lords have assassinated three high American officials.  ‘Ryan and his “dark side,” a shadowy field officer known only as Mr. Clark, … expect danger from without – but the danger from within may be the greatest of all.’ (from rear flap)